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Commit 171e7b37 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Rearrange dma_ops related functions 



This patch rearranges two dma_ops related functions so that
their forward declarations are not longer necessary.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 308973d3

arch/x86/kernel/amd_iommu.c

+42 −47
Original line number Diff line number Diff line
@@ -57,11 +57,6 @@ struct iommu_cmd { 
	u32 data[4];

};



static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,

			     struct unity_map_entry *e);

static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,

				      unsigned long start_page,

				      unsigned int pages);

static void reset_iommu_command_buffer(struct amd_iommu *iommu);

static void update_domain(struct protection_domain *domain);
@@ -822,28 +817,6 @@ static int iommu_for_unity_map(struct amd_iommu *iommu, 
	return 0;

}



/*

 * Init the unity mappings for a specific IOMMU in the system

 *

 * Basically iterates over all unity mapping entries and applies them to

 * the default domain DMA of that IOMMU if necessary.

 */

static int iommu_init_unity_mappings(struct amd_iommu *iommu)

{

	struct unity_map_entry *entry;

	int ret;



	list_for_each_entry(entry, &amd_iommu_unity_map, list) {

		if (!iommu_for_unity_map(iommu, entry))

			continue;

		ret = dma_ops_unity_map(iommu->default_dom, entry);

		if (ret)

			return ret;

	}



	return 0;

}



/*

 * This function actually applies the mapping to the page table of the

 * dma_ops domain.
@@ -872,6 +845,28 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom, 
	return 0;

}



/*

 * Init the unity mappings for a specific IOMMU in the system

 *

 * Basically iterates over all unity mapping entries and applies them to

 * the default domain DMA of that IOMMU if necessary.

 */

static int iommu_init_unity_mappings(struct amd_iommu *iommu)

{

	struct unity_map_entry *entry;

	int ret;



	list_for_each_entry(entry, &amd_iommu_unity_map, list) {

		if (!iommu_for_unity_map(iommu, entry))

			continue;

		ret = dma_ops_unity_map(iommu->default_dom, entry);

		if (ret)

			return ret;

	}



	return 0;

}



/*

 * Inits the unity mappings required for a specific device

 */
@@ -908,6 +903,26 @@ static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom, 
 * called with domain->lock held

 */



/*

 * Used to reserve address ranges in the aperture (e.g. for exclusion

 * ranges.

 */

static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,

				      unsigned long start_page,

				      unsigned int pages)

{

	unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT;



	if (start_page + pages > last_page)

		pages = last_page - start_page;



	for (i = start_page; i < start_page + pages; ++i) {

		int index = i / APERTURE_RANGE_PAGES;

		int page  = i % APERTURE_RANGE_PAGES;

		__set_bit(page, dom->aperture[index]->bitmap);

	}

}



/*

 * This function is used to add a new aperture range to an existing

 * aperture in case of dma_ops domain allocation or address allocation
@@ -1166,26 +1181,6 @@ static void domain_id_free(int id) 
	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);

}



/*

 * Used to reserve address ranges in the aperture (e.g. for exclusion

 * ranges.

 */

static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,

				      unsigned long start_page,

				      unsigned int pages)

{

	unsigned int i, last_page = dom->aperture_size >> PAGE_SHIFT;



	if (start_page + pages > last_page)

		pages = last_page - start_page;



	for (i = start_page; i < start_page + pages; ++i) {

		int index = i / APERTURE_RANGE_PAGES;

		int page  = i % APERTURE_RANGE_PAGES;

		__set_bit(page, dom->aperture[index]->bitmap);

	}

}



static void free_pagetable(struct protection_domain *domain)

{

	int i, j;